This is a video clip from the series Hitler's Secret Berlin form the National Geographic Channel. It discusses the work a team working in Berlin, Germany to create a detailed picture of the Nazi capital mapping out underground cities, roads, and bunkers.
Channels: Others
Tags: Hitler's Secret Berlin secret city underground city underground road hidden bunker
Uploaded by: SamuelMorse ( Send Message ) on 14-11-2010.
Duration: 2m 44s